Stylus for telautographs



Sept. 6, 1932. A. N. VAN NOSTRAND 1,875,833

STYLUS FOR TELAUTOGRAPHS Filed April 5, 1929 I N VEN TOR.

Patented Sept. 6, 1932 UNITED STATES ARLEIGH N. VAN NOSTRAND, F FLUSHING, NEW YORK, ASSIGNORiTOTELAIl'TOGRAPH CORPORATION, OF NEW YORK, N. Y-., A CORPORATION OF VIBGINI A STYLUS ron TELAUTOGRAPHS' Application filed April 5, 1929. Serial No. 352,619.

This invention relates to telautograph transmitting apparatus and more particularly to the stylus and stylus mounting.

The invention aims to provide improvements and refinements in this class of apparatus, such as shown in United States patcut to Van Nostrand, No.1,625,3 12, granted April 19, 1927.

It is an object of the present invention to 19 reduce wear, thereby to augment the accuracy of transmission and prolong the life of the apparatus.

Another object of the invention is to provide increased flexibility in the stylus mounting to facilitate writing.

A further object of the invention is to simplify the stylus and make the construction more economical, practical, and of fewer parts.

With these general objects in view, the invention consists in the features, combinations, details of construction and arrangements of parts which will first be described in connection with the accompanying drawing and then more particularly pointed out.

In the drawing:

Figure 1 is a side View of a stylus constructed in accordance with the invention;

Figure 2 is an enlarged view of details of the apparatus in separated position;

Figure 3 is an exploded view of a fragment of the construction;

Figure 4 is a view of a part of the telautograph apparatus;

Figure 5 is a detail view of a portion of the construction.

Referring to the drawing, the invention is exemplified in a stylus which includes a hollow rod 10, having at one end a knob 11, as in Patent No. 1,625,342 referred to. The other end of the rod is adapted to fit over a shank, 10 of a member which includes a flange, 12, a tapered portion, 13, extending from the flange, a ball, 14, at the end of the tapered portion, and a stylus point, 16, eX- tending from the ball. This member is preferably composed of a hard, resisting material, such, for example, as a specially treated steel or alloy. A sleeve, 15, of fibre or like material is seated on the rod against flange,

12, and is'shrunk firmly inplace. This sleeve presents a convenient finger grip.

Means are provided for mounting the stylus in a manner to reduce wear and to permit convenient manipulation inwriting. In the embodiment herein shown, the stylus mounton the stylus from being pulled out ofthe cups. In assembling, the cups, 20, are positioned on the ball, the ball and cups are then passed between the jaws of the yoke,

and the cups fastened by the pins, '17. The

yoke is so designed that the stylus point can swing freely through it without cramping. A limited transverse movement of the stylus is obtained by notching the stylus point as at 16 for the accommodation of the corners of the cups.

The yoke is attached at the end of one arm, 21, of a pair of arms 21, 22. v The two arms are pivoted together and to this end the pivoting means disclosed in Patent No. 1,625,342 may be employed. The arm 21 carries a ball 25 near the yoke, and the end of arm 22 a yoke 26 having resilient jaws 27 with sockets 28 to receive the ball. 25. The jaws press inwardly on the ball to retain it in place, while permitting the arms 21 and 22 to pivot freely with respect to each other. A set screw 29 connects the jaws to prevent their separation and release of the ball 25. The other ends of arms 21, 22, are arranged to engage the respective bell-crank arms of the transmitter rheostat. As this construction is well known, no detailed description is necessary. The connections between the ends of the arms and the transmitter rheostat levers are pivoted connections and may advantageously be similar to the pivoted connections between the arms themselves.

The stylus and stylus mounting of this invention possess important advantages over those shown in the prior patent referred to.

The ball 14 has a large bearing surface in the cup-shaped members to reduce the wear on the parts and to distribute wearing uniformly thus to augment the accuracy of transmitted writing. The ball 14 may rotate freely in its yoke and the stylus may pivot freely and universally and may consequently be manipulated conveniently. The free pivotal movement of the stylus provides an increased flexibility over prior apparatus, and a greater ease in writing. In addition, the stylus construction has the advantage of being simple, economical, and of few parts.

What is claimed is: V

1. A stylus for telautograph apparatus comprising a yoke on the end of one of the transmitting arms, said yoke having substantially rigid jaws, a pair of separate cup-like members, each flat on one face and having a spherically concave cup at the other face, a

' stylus having a ball whose radius is the same as the radii of the concave surfaces of the cup-like members, the two cup-like members andthe stylus ball in place therein fitting closely the space between the rigid jaws of the yoke, and removable means for fixing each cup-like member to its respective aW, when the parts have been assembled.

2. A stylus for t-elautograph apparatus comprising a rod, a flange at one end, atapering portion extending from the flange, a

ball on the end of the tapering portion, a

stylus point extending from the ball, and a sleeve on the rod seating'against the flange.

In testimony whereof, I have hereunto set my hand. I

ARLEIGH N. VAN NOSTRAND. 

